MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible The GigaTech Products MFEBX1-GT is programmed to be fully compatible and functional with all intended LINKSYS switching devices. This SFP optical transceiver is based on the Fast Ethernet standard and is designed to be compliant with SFF-8472 SFP Multi-source Agreement (MSA). This module is designed for single mode simplex fiber and operates at a nominal transmit wavelength of 1310nm and nominal receive wavelength of 1550nm. Features: • Up to 125MBd bi-directional data links • Hot-pluggable SFP footprint • 1310nm FP laser transmitter • Simplex LC Connector • Built in Digital Diagnostics • Up to 20km over 9/125 SMF • Single power supply 3.3V • Operating temperature range C-Temp: 0℃ to 70℃ Compliance: • SFP MSA SFF-8472 • Fast Ethernet • IEEE 802.3ah 1000Base-BX • RoHS • Class 1 laser product EN 60825 Applications • 125MBd Fast Ethernet Warranty: GigaTech Branded Optical Transceivers- Lifetime Warranty MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible General Specifications Parameter Data Rate Bit Error Rate Input Voltage Maximum Voltage Supply Current Storage Temperature Symbol DR BER VCC VMAX IS TSTO Min Typ Max Unit 125 3.0 -0.5 Remarks MBd 10-12 3.6 4.0 250 85 3.3 150 -40 V V mA ℃ Electric Power Interface Electric Power Interface Ambient Temperature Optical Characteristics - Transmitter Parameter Symbol Optical Center Wavelength Output Optical Power Extinction Ratio Spectral Width (RMS) Relative Intensity Noise Optical Rise/Fall Time PTX ER Min Typ Max Unit 1260 -14 9 1310 1360 -8 nm dBm dB nm dB/Hz ns RIN TRF_IN 1 4 – 120 2 Remarks Class 1 Product 20%-80% Optical Characteristics - Receiver Parameter Optical Center Wavelength Optical Receive Power Receiver Sensitivity Optical Return Loss Optical Isolation Loss of Signal-Asserted Loss of Signal-Deasserted Loss of Signal-Hysteresis Symbol C PRX RX_SEN ORL ISO PLOS_A PLOS_D Min Typ 1480 Max Unit 1580 0 -32 nm dBm dBm dB dB dBm dBm dB 14 -40 -45 -32 0.5 Remarks Average Electrical Characteristics – Transmitter Parameter Input differential impedance Single ended data input swing Transmit Disable Voltage Transmit Enable Voltage Transmit Disable Assert Time Symbol RIN VIN_PP VD VEN Min Typ Max Unit Remarks Non Condensing 1200 VCC VEE +0.8 10 Ω mV V V us 100 250 VCC -1.3 VEE Electrical Characteristics – Receiver Parameter Single ended data output swing Data output rise time LOS Fault LOS Normal Symbol Min Typ Max Unit VOUT_PP TR VLOS_F VLOS_N 300 400 800 300 mV ps V V VCC -0.5 VEE VCC_HOST VEE +0.5 Remarks 20%-80% MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible Digital Diagnostic Functions The SFP supports the 2-wire serial communication protocol as defined in the SFF 8472. Digital diagnostic information are accessible over the 2-wire interface at the address 0xA2. Digital Diagnostics are internally calibrated by default. A micro controller unit inside the transceiver gathers the monitoring information and reports the status of transceiver. Transceiver Temperature- Internally measured, represented as a 16 bit signed twos complement value in increments of 1/256 degrees Celsius, Temperature accuracy is better than ±3 degrees Celsius over specified operating temperature and voltage. Transceiver Supply Power- Internally measured, represented as a 16 bit unsigned integer with the voltage defined as the full 16 bit value (0 – 65535) with LSB equal to 100 μVolt, yielding a total range of 0 to +6.55 Volts. Transceiver TX bias current- Internally measured, represented as a 16 bit unsigned integer with the current defined as the full 16 bit value (0 – 65535) with LSB equal to 2 μA, yielding a total range of 0 to 131mA. Accuracy is better than ±10% over specified operating temperature and voltage. Transceiver TX output power- Internally measured, represented as a 16 bit unsigned integer with the power defined as the full 16 bit value (0 – 65535) with LSB equal to 0.1 μW. Data is assumed to be based on measurement of laser monitor photodiode current. Accuracy is better than ±3dB over specified temperature and voltage. Data is not valid when the transmitter is disabled. Transceiver RX received optical power- Internally measured, represented as a 16 bit unsigned integer with the power defined as the full 16 bit 35 value (0 – 65535) with LSB equal to 0.1 μW. Accuracy is better than ±3dB over specified temperature and voltage. Parameter Symbol Accuracy Units Report Range Unit Temperature Voltage Bias Current Tx Power Rx Power TMON VMON TF VLOS_F VLOS_N ±3 ±0.1 ±10 ±3 ±3 ℃ V % dB dB -40 - +95 2.7 - 3.9 1 – 80 -18 - -5 -30 - 0 ℃ V mA dBm dBm Dimensions Remarks MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED UNIT: mm PCB Layout Recommendation MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible Block Diagram of Transceiver Transmitter Section- The FP laser driver accept differential input data and provide bias and modulation currents for driving a laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power. 1310nm FP in an eye safe optical subassembly (OSA) mates to the fiber cable. TX_DISABLE- The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on within 1ms when TX_DISABLE is low (TTL logic “0”). TX_FAULT- When the TX_FAULT signal is high, output indicates a laser fault of some kind. Low indicates normal operation. Receiver Section- The receiver utilizes a PIN detector integrated with a trans-impedance preamplifier in an OSA. This OSA is connected to a Limiting Amplifier which providing post-amplification quantization, and optical signal detection. The limiting Amplifier is AC-coupled to the transimpedance amplifier, with internal 100Ω differential termination. Receive Loss (RX_LOS)- The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in TTL level. Controller Section- The micro controller unit monitors the operation information of LD driver and Limiting Amplifier and report these status to the customer. MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible Electrical Pad Layout MFEBX1-GT 100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible Pin Assignment PIN # 1 Symbol VEET 2 3 TFAULT TDIS 4 5 6 SDA SCL MOD_ABS 7 8 RS0 LOS 9 10 RS1 VEER 11 VEER 12 13 14 RDRD+ VEER 15 16 17 VCCR VCCT VEET 18 TD+ 19 20 TDVEET Description Transmitter ground (common with receiver ground) Transmitter Fault Transmitter Disable. Laser output disable on high or open Data line for serial ID Clock line for serial ID Module Absent. Ground within the module No Connection required Loss of Signal indication. Logic 0 indicates normal operation +3.3V Power Supply Receiver ground (common with transmitter ground) Receiver ground (common with transmitter ground) Receiver Inverted DATA out. AC coupled Receiver Non-inverted DATA out. AC coupled Receiver ground (common with transmitter ground) Receiver power supply Transmitter power supply Transmitter ground (common with receiver ground) Transmitter Non-inverted DATA out. AC coupled Transmitter Inverted DATA out. AC coupled Transmitter ground (common with receiver ground) Remarks Circuit ground is isolated from chassis ground Disabled: TDIS>2V or open Enabled: TDIS<0.8V Should Be pulled up with 4.7k – 10k ohm on host board to a voltage between 2V and 3.6V LOS is open collector output Circuit ground is isolated from chassis ground Circuit ground is isolated from chassis ground Same as Pin# 1 Circuit ground is connected to chassis ground Circuit ground is connected to chassis ground References 1. IEEE standard 802.3. IEEE Standard Department, 2002. 2. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 2000. 3. Digital Diagnostics Monitoring Interface for Optical Transceivers – SFF-8472.
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